Blue shift appears both on the absorb edges in the absorption spectra and on the band-edge emission in the luminescence spectrum.
在紫外吸收谱中表现为吸收边明显蓝移，而在光致发光谱中，表现为带边发射的蓝移。
A3 is detected using UV absorption and fluorescence emission spectra.
检测了A3的紫外吸收光谱和荧光发射光谱。
When there is temperature difference between the pollutant gas and the background, the absorption and emission characteristics of the pollutant gas can be revealed in infrared spectra.
当污染气体与背景存在温差时，红外光谱就能反映出污染气体的吸收或发射特征。
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